The word virus is often used as a common term for all malicious programmes, but technically a virus is a program or code that attaches itself to a legitimate, executable piece of software, and then reproduces itself when that program is run.

Viruses spread by reproducing and inserting themselves into programs, documents, or e-mail attachments. They can be transmitted through e-mails or downloaded files and they can be present on CDs, DVDs, USB-drives and any other sort of digital media.

‘Real-time scans’ scan files as you use them or as they are loaded on to your computer.
‘On-demand scans’ scan your entire computer whenever you consider it necessary or at specific scheduled intervals. It is advised that you run on demand scans at least once every two weeks to maintain a safe computer system environment.

Because new viruses are released every day, there's always a chance that your computer will be infected by a virus that your anti virus software does not yet "know" about. That’s why BullGuard updates itself every two hours while you are connected to the Internet, making sure you’re perfectly safe online.

Always keep all your other software updated

Because viruses often propagate by exploiting flaws in operating systems or commonly used programs, you need to keep your computer's operating system and other software updated. Whenever possible, configure your computer to download and install critical updates automatically. Otherwise, check for software updates regularly.

Avoid installing spyware and other software that may open backdoors which can be exploited

Only use e-mail services that scan messages for viruses

Deal with e-mail carefully

Viruses are often propagated via e-mail attachments. Avoid opening attachments unless you are reasonably sure the e-mail is legitimate